Drill-frame



(NoModelQ) I D. OLARKKFJ. LEE.

- i DRILL FRAME. No. 269,010. Patented Dec. '12, 1882-.

WITNESSES: v

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UNITED STATES PATENT OFFICE- DAVID CLARK AND JOHN LEE, ()F HAZLETON,PENNSYLVANIA.

D RlL L-F'RA M E.

SPECIFICATION forming part of Letters Patent No. 269,010, dated December12, 1882. Application as August 2,1882. (No model.)

To all whom it may concern Be it known that we, DAVID CLARK and ,1 JOHNLEE, both of Hazleton, in the county of Luzerne and State ofPennsylvania, have invented a new and useful Improvement in Drill-Frames, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure lis a front elevation of ourimprovement, shown as applied to asteam-boiler. Fig. 2 is a side elevation of the same, the chain beingremoved, and the swiveled screw being shown in section through the linewas, Fig. 1. Fig. 3 is a side elevation, partly in section, of theswiveled screw and claw-hook.

The object of this invention is to facilitate the drilling of holes insteam-boilers for the attachment of machinery.

The invention consists ina drill-frame constructed with a base havingpoints or claws, and a standard provided with an adjustable arm, and anarbor placed at a point above the base. A chain is connected with thearbor at one end by a. hook and at the other end by a swiveled'screw anda claw'hook, whereby the chain can be readily drawn taut to hold thedrill-frame securely in place, as will be hereinafter fully described.

A represents the base of the drill-frame,

usually called old man in machine-shops. The base A hasdownwardly-projecting points or claws B upon its corners, and isslightly curved, to better adapt it to rest upon the shell of a boiler.

Upon the base A is formed, or to it is rigidly attached, a standard, 0,upon which is placed the eye of the arm D. a The arm D is designed toreceive and support the drill-stock,

above the base B, is formed a hole to receive thearbor F, which issecured in place by a nut, G, screwed upon its end.

Upon the arborF is formed a neck to receive a hook, H, formed upon orattached to the 'end of a chain, I, or to receive a large link or ringformed upon or attached to the said end of the chain.

In the head of the arbor F is formed a screwhole to receive the screw J,to the head of whichis swiveled the stem of the claw-hook K. The stem ofthe claw-hook K can have a head formed upon or attached to it, to beinserted in a socket in the head of the screw J, where it is secured inplace by a sleeve placed upon'the said stein within the outer part ofthe said socket, and secured to the said screw bya pin, as shown inFigs. 1 and 3; or the claw-hook Kean be swiveled to the said screw byany other suitable means.

In using the drill-frame the base A is placed upon the boiler in thedesired position. The chain I is hooked upon the arbor F, is passedaround the boiler,is drawn tight, and is hooked upon the claw-hook K.The screw J is then turned to tighten the chain I and draw thedrill-frame down upon the boiler withany desired force, so that it willbe held tirmlly against the push of the drill-stock. With thisconstruction, the point of connection between the chain I and thestandard 0 being above the base, the drill-frame will be held much morefirmly than it can be when the said chain is connected with the saiddrill-frame at its base in the ordinary manner.

Having thus described our invention, What we claim as new,and desire tosecure by Letters Patent, is- I 1. A drill-frame constructedsubstantially as herein shown and described, and consisting of the baseA, having points or claws B, the standards O,'having adjustable arm D,the arbor F, the chain I, the claw-hook K, and the s'wiveleil screw J,as set forth.

2. In a drill-frame, the combination, with the chain I and arbor F, ofthe swiveled screw J and the claw-hook K, substantially as herein shownand described, whereby the chain can be readily drawn taut to hold thedrill-frame firmly in'place, as set forth.

DAVID CLARK. JOHN LEE.

Witnesses:

J OHN A. BARTON, G. BACHMAN.

